feat: add custom type support for int and uint

[yihau]

I found that It will panic when I serialize and deserialize including custom type. I add some support for these types:

• uint8
• uint16
• uint32
• uint64
• int8
• int16
• int32
• int64

[frol]

@yihau Thanks for the contribution!

I don't have deep experience with Go to reason about all the shortcomings, but the code looks reasonable to me 👍

[ouromoros]

It looks correct to me now. Great!

Last thing, I wonder if first calling v.Int() and then converting to the according type would have any performance impact. Perhaps should run a benchmark on it and see the difference.

[yihau]

here is the benchstat between master and my branch

name               old time/op  new time/op  delta
Deserialize-8      1.41µs ± 0%  1.69µs ± 0%   ~     (p=1.000 n=1+1)
Serialize-8         648ns ± 0%   623ns ± 0%   ~     (p=1.000 n=1+1)
FuzzSerialize-8    50.2µs ± 0%  46.6µs ± 0%   ~     (p=1.000 n=1+1)
FuzzDeserialize-8  4.65µs ± 0%  4.66µs ± 0%   ~     (p=1.000 n=1+1)

serialize is more efficient because get the value directly
there is a little bit performance impact to the deserialize function because of converting

[ouromoros]

LGTM

[yihau]

Hi, is there any news on this?

[ouromoros]

I think it's safe to merge now. Thanks for the contribution! @yihau